#include "stl.h"
#include "solution.h"

int main(int argc, char *argv[]){
    vector<vector<int>> routes = {
        {1,2,7},
        {3,6,7},
    };
    int source = 1, target = 6;
    int result = Solution().numBusesToDestination(routes, source, target);
    print("result=", result);
    return 0;
}